wilson



May 20, 1924.

` J. M. WILSON MAGNETIC INDUCTOR Original Filed Sept. l, 1917. F j

2 Sheets-Sheet 1 May 20, 1924. 1,495,060

J. M. WILSON MAGNETIC INDUGTOR original Filed sept. 1, 191'/ 2 sheets-snee@ Patented 4May 2o, 1924.

UNITED ,.sTATi-:s

PATENT OFFICE.

JAMES l'. WILSON, OF NEWARK, NEW JERSEY.

MAGNETIC INDUCTOR.

vApplication filed September 1, 1917, Serial lo. 189,251. Renewed October 10, 1923.

To all whom may concern.'

Be it known 'that I, JAMES M. VILsoN, a citizen of the United States, resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Magnetic Inductors, of which the following is a specification.

My invention relates more particularly to an improved magnetic inductor wherein a constant magnetic field is produced in any suitable manner as for example by a battery current or other suitable source which is adapted to energize magnetic pole pieces and rotary soft iron inductors which are adapted to direct the magnetic flux from the pole pieces through the soft iron core of an induction coil alternately in opposite directions. The soft iron induction coil core is surrounded by suitable windings preferably as primary and secondary coils wherein the primary circuit is adapted to be interrupted intermittently in synchronism with the rotary inductors.

My present device is an improvement upon the battery magnetic inductor shown and described in my Patent No. 1,308,567. In the present construction, the device has been much simplified, and a single pair of electromagnetic pole-pieces is preferably energized by a single battery coil, the axis of which is in a plane at right angles to the axis o f rotation of the rotary inductors. The battery pole-pieces are extended longitudinally of the rotary member and provided at either end with pole-faces adapted to co-operate respectively with two pairs of rotary inductors. The pairs of rotary inductors are spaced apart, one being above and the other below the transversely extending battery coil the inductors of each pair being in opposite quadrants and alternating with the' inductors of the other pair. In other words, the nductors of one pair are at right angles to the indue-tors of the other pair.

In this form of my device, I provide a soft iron'induction coil core, located at one side of the rotary member and between the electro-magnetic pole-pieces, its axis being parallel with the axis of rotation of the inductors. Pole-pieces are provided at eac-h end of the induction coil core, located re-4 spectively in the fields of the two pairs of inductors. The induction coil core polepieces are located in the same horizontal planes with the pole-faces at each end of the battery pole-pieces and 90 therefrom. The angularity may be changed when the device is designed for six cylinder engines.

By this arrangement, it will be seen that as the rotary member is rotated, the magnetic flux of the battery magnet will pass alternately in opposite directions through the induction coil core. The latter is provided with primary and secondary coils which are connected up substantially similar to the connection shown in my previous application hereinbefore referred to.

My improved device is shown in the accompanying`"drawings in which Fig. 1 represents av vertical section transversely of the magnetic pole-pieces. Fig. 2 represents a vertical section at right angles to the section shown in Fig. 1. Fig. .3 represents a top plan view of the interrupter connections. Fig. 4 is a top plan view of the pole pieces and rotary inductor. F ig.=5 is a plan of the electrical connections, and

Fig. 6 is a modified plan of the connections Referring to the drawings, 1 represents the cylindrical enclosing case of the device, the lower end of which is closed by a disk forming the base plate 2 of the instrument. The disk 2 is provided with a central boss 3 bored out to form the bearing for the lower end of the shaft 4 of the rotary member. The upper end of the shaft at 5 is preferably of smaller diameter and extends through a bushing 6 in a disk 7 forming the upper or top plate of the instrument. The base plate 2' and top plate 7 are preferably spaced apart and held in parallel relation by the electromagnetic pole-pieces 8 and 9 which are preferably secured tothe respective plates by means of screws 10, thereby forming a rigid construction. The polepieces 8 and 9 preferably extend vertically parallel with the shaft 5 and are provided with upper and lowerpole-faoes 11 and 12 adapted to co-operate respectively with two pairs of rotary inductors as hereinafter described. The pole-pieces 8 and 9 are connected by a transversely extending core 13 about which is mounted a coil 14.- adapted to be energized from the battery. The core 13 may be set in notches in the pole-pieces Sand 9 so that the core and coil 14; may be readily removed for repair or replacement when desirable. Opposite the battery coil 14 and, between the plates and 7 I preferi a plane through the ably mount a laminated soft iron core 15 provided with pole pieces 16 and 17 secured to the base plate 2 and top plate 7 by suitable screws 16a. The core 15 may be held in place in the notches of the pole ieces 16 and y17 by suitable screws or rivets 1 but -if desired the core 15 may be removably fitted into the notches of the pole-pieces to facilitate ready, removal of the coils for repairs. Suitable windings such as a primary coil 18 and a secondary coil 19 are mounted on the core 15, forming in the usual way an induction coil. The induction coil core 15 is preferably secured between the plates 2 and 7 in parallel relation with the shaft 5 of the rotary member. It will thus be seen that the axes of the primary and secondary coils are at right angles to axis of the battery coil 14. The pole-pieces 16 and 17 of the induction coil core are in the same horizontal plane with the respective pole-faces 11and 12 formed on the ele'ctromagnetl pole-pleces 8 and 9, and, as indicated in Figs. 4, 5 and 6, are 90 from the pole-pieces, or midway between them.

(1o-operating with the -pole-faces of the battery magnet and with the pole-pieces of the induction coil core, I preferably mount on the rotary member a pair of soft iron inductors. For this purpose, the shaft 5 .near each end .thereof is provided with a llanged disk 20 and 21 secured respectively to the upper and lower ends of the sha.ft 5 by suitable pins 22 and 23' as illustrated 1n Figs. 1 and 2 of they drawings. Each of these disks carries at its -periphery a pair of inductors 24 and 25 preferably made up of laminated Soft iron. Washers 26 and 27 preferably are placed above and below the respective inductors 24 and 25 and secured to the ianged members 20 and 21 by suitable rivets 28 adapted to pass of the laminated inductors as indicated 1n Fig. 4 of the drawings, and thereby secure the inductors in proper relation to the shaft 5. The disk members 20 and 21 and washers 26 and 27 are preferably of brass or other suitable non-magnetic material for magnetically insulatinr the yrespective 1nductors v24 and 25. s indicated in the drawings (see Figs. 4 and 5) the upper pair of inductors 24 are in opposite quadrants and alternate with the lower pair of inductors 25, or, in other words, one pair 'of inductors is at right angles to the other.

From this construction it will be seen that the magnetic flux of the battery magnet will `pass through one of the faces' 11-12 through an inductor to 'one of the pole-piecesof. the induction coil core 15 Vand after passing through the induction coil core will again ass through an inductor to the opposite po e of the battery magnet. The pairs of rotary inductors being atn right through the ends angles to each other above and below, the

ductors are rotated, the magnetic flux through the induction coil core will alternate in direction four times during one rotation of the rotary member.

The upper end of the shaft 5 is preferably provided with a washer 29 and nut 30 adapted to hold the rotary member in place in its bearings. The extreme upper' end 31 of the shaft 5 is turned down and preferably, has mounted thereon a multilobed cam 32 of insulating or other suitable material, a bushing 33 being provided for properly securing the lobed cam to the shaft 3l. The cam 32 in the present instance is shown as square (sec Fig. 3) and is adapted to coopera-te with a circuit breaker or interrupter suitably connected inthe primary circuit as indicated in Figs. 5 and 6 ofthe drawings. Preferably this. interrupter comprises a spring 34 secured in`slotted studs 35 and 36, projecting upward from the top plate 7 as indicated in Figs. 1 and 3 of the secured to the spring and upon this an'in' sulating strip 38, the metal strip 37 and insulatlng strip 38 being preferably secured to the spring 34 by means of screws or rivets 39. bviously it is not necessary that both the lobed cam32 and the strip 38 shall be of insulating material, since if one is of metal, the parts will be sufciently insulated.A A stop pin 40 is provided for limiting the outward movement of thestripI 37. The strip 37 is provided at 41 with a contact point adapted to co-operate with an adjustable contact point 42 secured to a bracket 43 projecting upward from the face. of the top plate 7. A condenser 44 is preferably connected across the contact points sub 'stantially as indicated in Figs. 3, 5 and 6 of the drawings.

An upwardly projecting button 45 of insulating material is mounted upon the top plate `7 as indicated in Figs. 1 and 3 of the ldrawings and provided with a resilient brush or contact point 46 connected Awith one end of tlie secondar coil. A disk of insulatlng material 47 is preferably mounted upon the upper end of the shaft 31 of the rotary member by means of a bushing 48 and a screw 49 as indicated in Fig. 1 of the drawings and is thereby adapted to rotate with the rotary member. The underside of this disk is'preferably rovided with an annular ring 50 adapte to co-operate with the conta/ct brush 46. vA contact pin 51 is connected with the ring 50 and projects through the upper face of the lio of the induction disk 47 in position to contact with the Asame time the end 58 of the 5 and 6 of sthe drawings are adapted to be connected respectively with the spark plugs 53 of a :fourv cylinder engine.

vReferring more particularly to Fig. 5 of the drawings, it will be seen that the magnet coil 14 is adapted to be connected with a battery 54, one lpole of which is grounded a't 55. A switc member 56 is connected at 57 with the line 58 leading to one end of the primary coil 18. The other end of the primary coil is connected by the wire 59 with the contact point 42 of the interrupter, the interrupter spring member 34 being grounded. at 60. The connection of the condenser y44 is indicated by the wires 6l and 62 connected respectively with the ground 60 and the wire 59 or contact point 42. The wire 63 leads from the battery 54 to one end of the magnet coil 14, the other end being connected by a wire 64 to the contact post 65 on the switch member. Another contact post 66 is provided and connected with the ground 67. Thus it will be seen that when the switch member ,.56 is thrown over to cover the contact posts 65 and 66, the battery circuit will be completed through the magnet coil 14 and the two ground connections`55'and 67. At the cuit 18 is grounded at 67 through the contact 66. The opposite end of the primary circuit is grounded at 60.

The secondary circuit 19 is indicated as connected by a wire 68,with the'rotating arm 69 which carries a contact pin corresponding with the contact 51 represented in Fig. 1 of the drawings, the four contact sockets 52 bein represented as connected with the spar plugs 53. The latter are connected to the ground in the usual manner as indicated by the Wire 70 leading to the ground 71, the other end 72 of the secondary'coil being also grounded at 71. The relation of the parts is such that the multilobed member 32 will interrupt the primary circuit at the maximum and minimum points of induction and simultaneously the contact member 51 will be incontact with one of the plug members 52, sothat a spark will be produced across the gap'of the corresponding spark plug.

As described in my previous application hereinbefore referred to, I preferably provide an additional contact 73 in co-operative relation with the switch arm 56 and connected by wire 74 with the battery 54, so that in starting, the arm 56 may be moved over into contact with thel button 7 3 and thus direct the entire battery current through the primary coil 18.

In some cases it may be desirable to rearrange the connections as more particularly illustrated in Fig. 6 vof the drawings. In this representation, the corresponding parts are indicated by the same characters as in Fig. 5, the main difference being in the primary cirform of switch employed. In this form, the battery 54 is connected' by a wire 7 5 with the center 76 of the switch arm 77 adapted to cover a pair of contact points 78 and 79.

The contact point 78 is connected by a wire 80 with one end of the primary coil 18. The contact point 79 by means of an intermediate loop 81 is connected with another contact point 82, the latter being connected by a wire 83 with one end of the battery coil 14, the other end of the coil 14 being grounded at 84. The switch arm 77 is provided on the opposite side on the center 76 with another arm 85 insulated from the arm 77 by an interposed strip of insulation at 86. The switch block is preferably provided with two additional contact points 87 and 88, the latter 88 being connected with the ground at 89. The contact point 87, is connected by means of a loop 9() with the contact point 78, which las previously described, is `connected by the wire 8O to the primary coil. With a switch connected in this manner, it will be seen that when the switch arms 77 and 85 are in the position indicated by full lines in Fig. 6, the battery circuit will be divided and part will pass through the mag' net coil 14 and part through the primary coil 18, the two being connected in parallel circuit.. If, however, the switch arms are thrown to the dotted line position, vthe entire battery current will pass through the battery coil 14 while the primary coil will be grounded at 89.

In this improved form of my magnetic inductor, I have shown a construction particularly adaptable to four cylinder engmes, but obviously, I do not wish to be limited to the specific construction shown, for various modifications in the details of construction may be made in adapting the device to engines of various types without departing from the spirit and scope of the invention.

I I Cilalll'l.-A

1. A magnetic inductor comprising a rotary member, an electro-magnet provided withbifurcated pole-ends, located respectively in opposite quadrants relatively vto the axis of said rotary member, similar poleends being spaced apart longitudinally of said axis, a battery coil for energizing said pole-ends, said coil being at right angles to the axis of said rotary member. a soft iron induction coil core mounted on the opposite side of the rotary member from said battery coil and parallel with the axis of said ro-4 angles to the other pair, whereby the direction of the magnetic flux through the'inductors and said induction coil core is adapted to alternate when said inductors are rotated, the flux being through the core and an inductor opposite each of said pole-pieces.

2. A magnetic inductor comprising a rotary member, an electro-magnet provided with bifurcated pole-ends, located respectively in opposite quadrants relatively to the axis of said rotary member, similar pole-ends being spaced apart longitudinally of said axis, a battery coil for energizing said pole-ends, said coil being at right angles to the axis of said rotary member, a soft iron induction coil core mounted on the opposite side of the rotary member from said battery coil and parallel with the axis of said rotary member, said core being prof vided with pole-pieces at each end, located in quadrants 'between said bifurcated poleends, primary 'and secondary coils on said core, a pair of segmental inductors mounted on said rotary member for cooperation with said pole-pieces and the corresponding 'bifurcated pole-ends Aat `each end of said core, the segmental `inductors of each pair being located in opposite quadrants and at right angles to the other pair, wherebythe direction of the magnetic flux through the inductors and said induction coil core is adapted to alternate when said inductors 3. A magnetic inductor'comprising a rotary member provided near each end witha air of magnetically insulated inductors the inductors of each pair being in opposite quadrants and at right angles'tc the other pair, electromagnetic pole pieces on opposite sides of said rotary member and extending lengthwise thereof provided with pole faces above and below in the field of rotation of the respective pairs of-inductors, a. core connecting said polev pieces extending transversely of the axis of said rotary member, a battery coil about said core for energizing said Apole pieces, an induction coil core parallel with the axis of said rotary member provided with pole pieces at each end, between and 90 from the corresponding magnet pole faces in the field of the respective pairs of inductors, primary and l secondary coils about said induction coil core, connections for sending a battery current through said battery coil while the circuit of said primary is closed by grounding and means synchronized with said rotary member for intermittently interrupting the primary circuit. i

JAMES WVILSON. 

